Is Premium Techie Support a scam?

Hi,

I've seen a post in the past about this company called Premium Techie Support. A while back my mac was experiencing pop ups and a bad virus (somehow). I got in touch with this company (somehow... now that I come to think of it, it was a software pop up on my laptop). They made me pay $500 to "get my laptop back up and running". They also requested a monthly payment, but I got out of that. It was $500 for lifetime support. Now Im getting an email from them saying my membership will expire December 11th. I honestly can't tell if this was all a scam or not. Especially because their website is glitchy wont allow me to put in my phone number so that they can call me back.

Any tips???

[Re-Titled by Moderator]